package models

import (
	"errors"
	"fmt"
	"reflect"
	"strings"
	"time"

	"gitee.com/lzqysoft/ims/libs/encrypt"
	"github.com/astaxie/beego/orm"
)

type SysApp struct {
	Id            string       `orm:"column(id);pk"`
	Status        int       `orm:"column(status)"`
	Isdelete      int       `orm:"column(isdelete)"`
	Ctime         time.Time `orm:"column(ctime);type(timestamp with time zone)"`
	Creater       string    `orm:"column(creater);null"`
	Utime         time.Time `orm:"column(utime);type(timestamp with time zone)"`
	Updater       string    `orm:"column(updater);null"`
	VersionCode   int       `orm:"column(version_code);null"`
	VersionName   string    `orm:"column(version_name);null"`
	UpdateContent string    `orm:"column(updateContent);null"`
	Url           string    `orm:"column(url);null"`
	Md5           string    `orm:"column(md5);null"`
	Size          int64     `orm:"column(size);null"`
	Package       string   	`orm:"column(package);null"`
	Channel       string   	`orm:"column(channel);null"`
}

func (t *SysApp) TableName() string {
	return "sys_app"
}

func NewSysApp() *SysApp {
	m := &SysApp{}
	m.Id = encrypt.GetGuid()
	m.Status = 1
	m.Isdelete = 0
	m.Ctime = time.Now()
	m.Utime = time.Now()
	return m
}

func init() {
	orm.RegisterModel(new(SysApp))
}

// AddSysApp insert a new SysApp into database and returns
// last inserted Id on success.
func AddSysApp(m *SysApp) (id int64, err error) {
	o := orm.NewOrm()
	id, err = o.Insert(m)
	return
}

// GetSysAppById retrieves SysApp by Id. Returns error if
// Id doesn't exist
func GetSysAppById(id string) (v *SysApp, err error) {
	o := orm.NewOrm()
	v = &SysApp{Id: id}
	if err = o.Read(v); err == nil {
		return v, nil
	}
	return nil, err
}

// GetAllSysApp retrieves all SysApp matches certain condition. Returns empty list if
// no records exist
func GetAllSysApp(query map[string]string, fields []string, sortby []string, order []string,
	offset int64, limit int64) (ml []interface{}, err error) {
	o := orm.NewOrm()
	qs := o.QueryTable(new(SysApp))
	// query k=v
	for k, v := range query {
		// rewrite dot-notation to Object__Attribute
		k = strings.Replace(k, ".", "__", -1)
		if strings.Contains(k, "isnull") {
			qs = qs.Filter(k, (v == "true" || v == "1"))
		} else {
			qs = qs.Filter(k, v)
		}
	}
	// order by:
	var sortFields []string
	if len(sortby) != 0 {
		if len(sortby) == len(order) {
			// 1) for each sort field, there is an associated order
			for i, v := range sortby {
				orderby := ""
				if order[i] == "desc" {
					orderby = "-" + v
				} else if order[i] == "asc" {
					orderby = v
				} else {
					return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
				}
				sortFields = append(sortFields, orderby)
			}
			qs = qs.OrderBy(sortFields...)
		} else if len(sortby) != len(order) && len(order) == 1 {
			// 2) there is exactly one order, all the sorted fields will be sorted by this order
			for _, v := range sortby {
				orderby := ""
				if order[0] == "desc" {
					orderby = "-" + v
				} else if order[0] == "asc" {
					orderby = v
				} else {
					return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
				}
				sortFields = append(sortFields, orderby)
			}
		} else if len(sortby) != len(order) && len(order) != 1 {
			return nil, errors.New("Error: 'sortby', 'order' sizes mismatch or 'order' size is not 1")
		}
	} else {
		if len(order) != 0 {
			return nil, errors.New("Error: unused 'order' fields")
		}
	}

	var l []SysApp
	qs = qs.OrderBy(sortFields...)
	if _, err = qs.Limit(limit, offset).All(&l, fields...); err == nil {
		if len(fields) == 0 {
			for _, v := range l {
				ml = append(ml, v)
			}
		} else {
			// trim unused fields
			for _, v := range l {
				m := make(map[string]interface{})
				val := reflect.ValueOf(v)
				for _, fname := range fields {
					m[fname] = val.FieldByName(fname).Interface()
				}
				ml = append(ml, m)
			}
		}
		return ml, nil
	}
	return nil, err
}

// UpdateSysApp updates SysApp by Id and returns error if
// the record to be updated doesn't exist
func UpdateSysAppById(m *SysApp) (err error) {
	o := orm.NewOrm()
	v := SysApp{Id: m.Id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Update(m); err == nil {
			fmt.Println("Number of records updated in database:", num)
		}
	}
	return
}

// DeleteSysApp deletes SysApp by Id and returns error if
// the record to be deleted doesn't exist
func DeleteSysApp(id string) (err error) {
	o := orm.NewOrm()
	v := SysApp{Id: id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Delete(&SysApp{Id: id}); err == nil {
			fmt.Println("Number of records deleted in database:", num)
		}
	}
	return
}

// CheckUpdate 检查更新
func CheckUpdate(channel, appPackage string, versionCode int) (*SysApp, error) {
	o := orm.NewOrm()
	var m SysApp
	sql := `
	SELECT *
	FROM  sys_app t1
	WHERE t1.channel=? AND t1.package = ?
	ORDER BY t1.version_code DESC LIMIT 1`
	if err := o.Raw(sql, channel, appPackage).QueryRow(&m); err != nil {
		return nil, err
	}

	return &m, nil
}

// GetAppVersions 获取app版本信息
func GetAppVersions(channel, appPackage string) ([]SysApp, error) {
	o := orm.NewOrm()
	var l []SysApp
	_, err := o.QueryTable(new(SysApp)).Filter("channel", channel).Filter("package", appPackage).
		OrderBy("-VersionCode").All(&l)
	return l, err
}

// GroupApps 查询已管理app，当channel 与 package一致是，认为是同一app
func GroupApps() ([]orm.Params, error) {
	sql := `SELECT channel,package FROM sys_app t0
	GROUP BY channel, package `
	o := orm.NewOrm()
	var l []orm.Params
	_, err := o.Raw(sql).Values(&l)
	return l, err
}
